Manifold



0. C. KREIS April 21, 1931'.

MANIFOLD 2 Sheets-Sheet 1 Filed Nov. 5, 1927 ATTORNEY.

0. C. KREIS MANIFOLD April 21, 1931.

Filed Nov. 5, 1927 2 Sheets-Sheet 2 INVENTORJ I 6316 6 A TTORNEY.

Patented Apr. 21, 1931 UNETED PATENT QFFEQE OSCAR C. KREIS, F DETROITQMICHIGAN, ASSIG-NOR 'IO CONTINENTAL MOTORS COB- POBATIGN, IVZIGHIGAN, A CORPORATION 91? VIRGINIA.

MANIFOLD Application filed November 3, 192?.

vaporized particles of the gaseous mixture frequently are carried into certain cylinders to a greater extent than into other cylinders resulting in general inefiicient engine performance. In order to reduce this condition as much as possible the intake manifold is ordinarily jacketed to apply heat to the intake mixture, a portion at least of the wet particles being thereby vaporized. However such heating of the mixture is generally admitted to reduce the volumetric efliciency of equal distribution of intake mixture is there by afforded for each cylinder resulting in increased engine efiiciency. At the same time I contemplate the elimination of much, if not all,- of the manifold heating which is ordinarily employed with resulting increased engine efiiciency and a better engine power outllt. 1

A further beneficial result of my invention resides in providing independent manifold conduits for the cylinders whereby the gas surge to any cylinder will not be materially interfered with by any other cylinder intake.

In carrying out my invention I find it desirable to provide a chamber communicating 'f" e with the mixlng carburetor, the lndividual conduits for each cylinder being branched generally longitudinally of the engine to the respective cylinders. WVith such an arrange ment the conduits may be made of relatively 59 large cross sectional area, afiording greater the fuel distribution.

Serial No. 230,730.

power output for the engine. My invention is especially useful in engines having six cylinders in line, greater dii'ficulty of the aforesaid nature having been experienced with such an engine than in the four cylinder type for example.

Other features of my invention reside in the combination and arrangement of parts more particularly hereinafter described and.

claimed.

Referring to the drawings in which like reference characters lndicate corresponding parts,

Fig. 1 is a side elevation view of an internal. combustion engine showing my manlfold applied thereto, 7 Fig. 2 is a sectional elevation view of the intake manifold,

Fig. 3 is Fig. 1,

Fig. 4; is a sectional view through 4-4: of Fig. 2,

i Fig. 5 is a view corresponding to Fig. 2

illustrating a modified form of my invention,

Fig. 6 is a sectional view through 6-6 of Fig. 5, a

7 is a view corresponding to Fig. 2 showing a further modification of my invention, and

Fig. 8 is a sectional view through 88 of Fig. 7.

In the drawings reference character A represents the engine, illustrated as having six cylinders in line, B representing the exhaust manifold and C the intake manifold. The en gine A may be of the well known general construction such as used for automotive vehicles.

The intake manifold C comprises a central chamber 10 preferably substantially rectangular in cross section and extending generally vertically from an inlet 11 which communicates with the mixing carburetor. The chamber 10 is provided with front wall 12, rear wall 13, and side walls 14 and 15. The chamber 10 may have its side walls 14 and 15 tapering upwardly and inwardly to facilitate Thus the chamber volume is proportioned to the deman of the c ndu ts refe red to h einaft r.

a sectional view through 33 of.

Extending longitudinally of the engine from the chamber 10 are conduits 16, 17, 18, 19, 20, 21, respectively provided with outlets 22, 23, 24, 25, 26, 27 which communicate with the respective cylinder intakes of the engine.

The conduits 16, 17 communicating with the central cylinders preferably communicate with the chamber 10 opposite each other in the walls 15, 16 respectively, the conduits 18, 19 leading to the second and fifth cylinders having their communication with the chamber 10 likewise in opposite relationship 'next below the conduits 16, 17, and the conduits 20, 21 leading to the end cylinders having similarly aligned openings in the chamber 10. As shown in Fig. 3 the side walls 14, 15 are preferably of greater width than the con duit openings in the chamber 10 so that the condensate or unvaporized particles striking the top chamber wall 28 can run downwardly along the side walls beside the conduit openings without being carried thereinto to as great an extent as would result in bringing the side walls adjacent the conduit openings.

The entire manifold C may be cast integrally with single dividing walls between adjacent conduits as shown. The areas of the conduits are preferably relatively greater than standard practice, any precipitation of wet particles resulting from such increased area being carried along to the particular cylinder communicating with the respective conduits. By arranging the conduits and chamber 10 as shown, the distance from the chamber inlet 11 to each cylinder is equalized to some extent.

I have not illustrated the usual heating jacket around the intake manifold above the carburetor connection inasmuch as such jacketing is well known in the art and may be employed as desired. However, one feature of my invention resides in a construction which will eliminate much, if not all, of the heating ordinarily employed as previous set forth. I do not limit my invention, apart from the claims, to the presence or absence of a heating jacket since in either event my manifold construction will afford improved results.

Referring to Fig. 5 I have shown a modilied form of my invention in which the chamber 10 is divided by a chamber partition 29, the divided chamber portions supplying the conduits 16, 17, 18, 19 20, 21. The divided chamber 10 preferably connects at its out let 11 with a duplex carburetor of well known construction affording independent mixture supply to the two groups of conduits which communicate with the respective divided portions of a chamber 10. Also, if desired, the vertical relationship of the con duit openings in the chamber 10 for the central pair and end cylinders may be reversed with respect to the relation shown in Fig. 2.

In Fig. 7 a still further modification includes a manifold generally similar to that shown in Fig. 2 except that the cross sectional areas of the conduits are progressively decreased in the order of the proximity of the associated cylinder intakes with the chamber 10, whereby the quantity of gases supplied each cylinder will be more nearly equalized. Thus the central pair of cylinders have their conduits 16', 17" of the smallest cross sectional area; conduits 18 19*, being slightly greater in cross sectional area (exaggerated in the drawings for disclosure) and conduits 20", 21" being still greater in cross sectional area.

The vertically extending fuel mixing chamber and other parts may vary in proportion, shape, and the like without departing from the broad characteristics of my invention and I do not limit my invention except as specific lly recited in the appended claims.

lVhat I claim as my invention is:

1. An intake manifold for internal combustion engines comprising fuel mixture chamber means opening vertically for admission of a fuel mixture, and a plurality of conduits each opening into the said chamber means and each extending for connection to an individual engine cylinder intake, the conduit openings to the chamber means being arranged substantially in a common vertical plane.

2. An intake manifold for a six cylinder internal combustion engine comprising chamber means opening downwardly for admission of a fuel mixture and closed at the top, and six conduits arranged in two groups of three vertically spaced conduits, each conduit opening into the chamber means and extending generally longitudinally of the engine for connection with a single cylinder intake.

3. An intake manifold for internal combustion engines comprising a vertical chamber opening downwardly for admission of a fuel mixture, and a plurality of conduits vertically arranged in groups, the conduits of each group opening into the said chamber and each conduit of each group extending for communication with a single cylinder intake.

4. An intake manifold for a six cylinder internal combustion engine comprising a tapering vertically extending chamber opening downwardly for admission of a fuel mixture and closed at the top, and six separate conduits arranged in two groups of three conduits, each conduit opening into said chamber and each connected with a single cylinder intake.

5. An intake manifold for internal combustion engines comprising a vertical chamber opening downwardly for admission of a fuel mixture, and a plurality of conduits ar ranged in groups, the conduits of each group opening into the said chamber and each conduit of each group extending for communi cation with a single cylinder intake, the

chamber conduit openings of each group being spaced vertically of the chamber.

6. An intake manifold for a six cylinder internal combustion engine comprising a vertically extending chamber opening downwardly for admission of a fuel mixture and closed at the top, and six separate conduits arranged in two groups of three conduits, each conduit opening into said chamber and each connected with a single cylinder intake, the chamber conduit openings of each group being spaced vertically of the cham- 7. An intake manifold for internal combustion engines comprising a vertical chamber opening downwardly for admission of a fuel mixture and a plurality of conduits arranged in groups, the conduits of each group opening into the said chamber and each conduit of each group extending for communication with a single cylinder intake, the chamber conduit openings of each group being spaced vertically of the chamber, the conduits connecting the central pair of cylinder intakes communicating with the upper portion of said chamber.

8. An intake manifold for internal combustion engines comprising a vertical chamber opening downwardly for admission of a fuel mixture and a plurality of conduits arranged in groups, the conduits of each group opening into the said chamber and each conduit of each group extending for communication with a single cylinder intake, the

' chamber conduit openings of each group being spaced vertically of the chamber, the conduits connecting the central pair of cylinder intakes communicating with the upper portion of said chamber, the conduits connecting the end cylinder intakes communieating with the lower portion of said chamber.

9. An intake manifold for internal combustion engines comprising a chamber substantially rectangular in cross-section and having opposed front and rear walls, opposed side walls, a top wall, and opening downwardly for admission of a fuel mixture, a group of conduits opening into one of the chamber side walls and a second group of conduits opening into the other of the chamber side walls, the chamber conduit openings of each group being spaced vertically of the chamber, each conduit of each group extending for connection with a single cylinder intake.

10. An intake manifold for internal combustion engines comprising a chamber substantially rectangularin cross-section and having opposed front and rear walls, opposed side walls, a top wall, and opening downwardly for admission of a fuel mixture, a group of conduits opening into one of the chamber side walls and a second group of conduits opening into the other of the chamthe conduits progressively decreasing in the order of the proximity of the associated cylinder intakes with the chamber.

12. An intake manifold for a six cylinder internal combustion-engine comprising a vertically extending chamber opening downwardly for admission of a fuel mixture and closed at the top, and six separate conduits arranged in two groups of three conduits, each conduit opening into said chamber and each connected with .aasingle'cylinder intake,

the cross-sectional areas of the conduits progressively decreasing in the order of the proximity of the associated cylinder intakes with the chamber.

13. An intake manifold for an internal combustion engine comprising a chamber re *ceiving a fuel mixture for distribution to the engine cylinder intakes,- and conduits connectingthe chamber withthe cylinder intakes,

the areas of the conduits progressively 'decreasing in the order of the proximity of the associated cylinder intakes "with the chamber.

14. An intake :manifold for internal combustion .enginesacomprising vertically opening fuel mixture chamber means and a p111- rality of groups of conduits opening into the chamber means and "adapted to conduct fuel mixture to the cylinders of the engine, said chamber means tapering in a direction opposite to the said opening thereof whereby the volume of the chamber means is proportioned to the requirements of said conduits.

15. An intake manifold for internal combustion engine comprising vertically opening fuel mixture chamber means and a plurality of groups of conduits opening into the chamber means and adapted to conduct fuel mixture to the cylinders of the engine, said chamber means tapering in a direction opposite to the said opening thereof whereby the volume of the chamber means is proportioned to the requirements of said conduits, the conduits of each group having their openings spaced vertically ofthe chamber means.

16. An intake manifold for internal combustion engines comprising vertically opening fuel mixture chamber means and a plurality of groups of conduits opening into the chamber means and adapted to conduct fuel f mixture to the cylinders of the engine, said I chamber means tapering in a direction opposite to the said opening thereof whereby the volume of the chamber means is propor tioned to the requirements of said conduits, the areas of the conduits progressively decreasing in the order of the proximity of the associated cylinder with the chamber means.

17. An intake manifold for internal combustion engines comprising a chamber substantially rectangular in cross-section and having opposed front and rear walls, pposed side walls, a top Wall and opening downwardly for admission of a fuel mixture, a group of conduits rectangular in cross-section opening into one of the chamber side walls and a second group of conduits rectangular in cross-section opening into the other of the chamber side walls, the chamber conduit openings of each group being spaced vertically of the chamber, each conduit of each group extending for connection with a single cylinder intake.

18. An intake manifold for internal combustion engines comprising a chamber substantially rectangular in cross-section and having opposed front and rear walls, opposed side walls, a top wall and opening downwardly for admission of a fuel mixture, a group of conduits rectangular in cross-section opening into one of the chamber side walls and a second group of conduits rectangular in crosssection opening into the other of the chamber side walls, the chamber conduit openings of each group being substantially rectangular in cross-section and spaced vertically of the chamber, each conduit of each group extending for connection with a single cylinder intake. In witness whereof, I hereunto subscribe my name this 28th day of October, A. D.

OSCAR C. KREIS. 

